﻿using System;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;
using System.Threading.Tasks;
using Jellyfin.Api.Attributes;
using Jellyfin.Api.Helpers;
using Jellyfin.Api.Models.StreamingDtos;
using MediaBrowser.Controller.MediaEncoding;
using MediaBrowser.Model.Dlna;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Mvc;

namespace Jellyfin.Api.Controllers
{
    /// <summary>
    /// The audio controller.
    /// </summary>
    // TODO: In order to authenticate this in the future, Dlna playback will require updating
    public class AudioController : BaseJellyfinApiController
    {
        private readonly AudioHelper _audioHelper;

        private readonly TranscodingJobType _transcodingJobType = TranscodingJobType.Progressive;

        /// <summary>
        /// Initializes a new instance of the <see cref="AudioController"/> class.
        /// </summary>
        /// <param name="audioHelper">Instance of <see cref="AudioHelper"/>.</param>
        public AudioController(AudioHelper audioHelper)
        {
            _audioHelper = audioHelper;
        }

        /// <summary>
        /// Gets an audio stream.
        /// </summary>
        /// <param name="itemId">The item id.</param>
        /// <param name="container">The audio container.</param>
        /// <param name="static">Optional. If true, the original file will be streamed statically without any encoding. Use either no url extension or the original file extension. true/false.</param>
        /// <param name="params">The streaming parameters.</param>
        /// <param name="tag">The tag.</param>
        /// <param name="deviceProfileId">Optional. The dlna device profile id to utilize.</param>
        /// <param name="playSessionId">The play session id.</param>
        /// <param name="segmentContainer">The segment container.</param>
        /// <param name="segmentLength">The segment lenght.</param>
        /// <param name="minSegments">The minimum number of segments.</param>
        /// <param name="mediaSourceId">The media version id, if playing an alternate version.</param>
        /// <param name="deviceId">The device id of the client requesting. Used to stop encoding processes when needed.</param>
        /// <param name="audioCodec">Optional. Specify a audio codec to encode to, e.g. mp3. If omitted the server will auto-select using the url's extension. Options: aac, mp3, vorbis, wma.</param>
        /// <param name="enableAutoStreamCopy">Whether or not to allow automatic stream copy if requested values match the original source. Defaults to true.</param>
        /// <param name="allowVideoStreamCopy">Whether or not to allow copying of the video stream url.</param>
        /// <param name="allowAudioStreamCopy">Whether or not to allow copying of the audio stream url.</param>
        /// <param name="breakOnNonKeyFrames">Optional. Whether to break on non key frames.</param>
        /// <param name="audioSampleRate">Optional. Specify a specific audio sample rate, e.g. 44100.</param>
        /// <param name="maxAudioBitDepth">Optional. The maximum audio bit depth.</param>
        /// <param name="audioBitRate">Optional. Specify an audio bitrate to encode to, e.g. 128000. If omitted this will be left to encoder defaults.</param>
        /// <param name="audioChannels">Optional. Specify a specific number of audio channels to encode to, e.g. 2.</param>
        /// <param name="maxAudioChannels">Optional. Specify a maximum number of audio channels to encode to, e.g. 2.</param>
        /// <param name="profile">Optional. Specify a specific an encoder profile (varies by encoder), e.g. main, baseline, high.</param>
        /// <param name="level">Optional. Specify a level for the encoder profile (varies by encoder), e.g. 3, 3.1.</param>
        /// <param name="framerate">Optional. A specific video framerate to encode to, e.g. 23.976. Generally this should be omitted unless the device has specific requirements.</param>
        /// <param name="maxFramerate">Optional. A specific maximum video framerate to encode to, e.g. 23.976. Generally this should be omitted unless the device has specific requirements.</param>
        /// <param name="copyTimestamps">Whether or not to copy timestamps when transcoding with an offset. Defaults to false.</param>
        /// <param name="startTimeTicks">Optional. Specify a starting offset, in ticks. 1 tick = 10000 ms.</param>
        /// <param name="width">Optional. The fixed horizontal resolution of the encoded video.</param>
        /// <param name="height">Optional. The fixed vertical resolution of the encoded video.</param>
        /// <param name="videoBitRate">Optional. Specify a video bitrate to encode to, e.g. 500000. If omitted this will be left to encoder defaults.</param>
        /// <param name="subtitleStreamIndex">Optional. The index of the subtitle stream to use. If omitted no subtitles will be used.</param>
        /// <param name="subtitleMethod">Optional. Specify the subtitle delivery method.</param>
        /// <param name="maxRefFrames">Optional.</param>
        /// <param name="maxVideoBitDepth">Optional. The maximum video bit depth.</param>
        /// <param name="requireAvc">Optional. Whether to require avc.</param>
        /// <param name="deInterlace">Optional. Whether to deinterlace the video.</param>
        /// <param name="requireNonAnamorphic">Optional. Whether to require a non anamporphic stream.</param>
        /// <param name="transcodingMaxAudioChannels">Optional. The maximum number of audio channels to transcode.</param>
        /// <param name="cpuCoreLimit">Optional. The limit of how many cpu cores to use.</param>
        /// <param name="liveStreamId">The live stream id.</param>
        /// <param name="enableMpegtsM2TsMode">Optional. Whether to enable the MpegtsM2Ts mode.</param>
        /// <param name="videoCodec">Optional. Specify a video codec to encode to, e.g. h264. If omitted the server will auto-select using the url's extension. Options: h265, h264, mpeg4, theora, vpx, wmv.</param>
        /// <param name="subtitleCodec">Optional. Specify a subtitle codec to encode to.</param>
        /// <param name="transcodingReasons">Optional. The transcoding reason.</param>
        /// <param name="audioStreamIndex">Optional. The index of the audio stream to use. If omitted the first audio stream will be used.</param>
        /// <param name="videoStreamIndex">Optional. The index of the video stream to use. If omitted the first video stream will be used.</param>
        /// <param name="context">Optional. The <see cref="EncodingContext"/>.</param>
        /// <param name="streamOptions">Optional. The streaming options.</param>
        /// <response code="200">Audio stream returned.</response>
        /// <returns>A <see cref="FileResult"/> containing the audio file.</returns>
        [HttpGet("{itemId}/stream.{container:required}", Name = "GetAudioStreamByContainer")]
        [HttpGet("{itemId}/stream", Name = "GetAudioStream")]
        [HttpHead("{itemId}/stream.{container:required}", Name = "HeadAudioStreamByContainer")]
        [HttpHead("{itemId}/stream", Name = "HeadAudioStream")]
        [ProducesResponseType(StatusCodes.Status200OK)]
        [ProducesAudioFile]
        public async Task<ActionResult> GetAudioStream(
            [FromRoute, Required] Guid itemId,
            [FromRoute] string? container,
            [FromQuery] bool? @static,
            [FromQuery] string? @params,
            [FromQuery] string? tag,
            [FromQuery] string? deviceProfileId,
            [FromQuery] string? playSessionId,
            [FromQuery] string? segmentContainer,
            [FromQuery] int? segmentLength,
            [FromQuery] int? minSegments,
            [FromQuery] string? mediaSourceId,
            [FromQuery] string? deviceId,
            [FromQuery] string? audioCodec,
            [FromQuery] bool? enableAutoStreamCopy,
            [FromQuery] bool? allowVideoStreamCopy,
            [FromQuery] bool? allowAudioStreamCopy,
            [FromQuery] bool? breakOnNonKeyFrames,
            [FromQuery] int? audioSampleRate,
            [FromQuery] int? maxAudioBitDepth,
            [FromQuery] int? audioBitRate,
            [FromQuery] int? audioChannels,
            [FromQuery] int? maxAudioChannels,
            [FromQuery] string? profile,
            [FromQuery] string? level,
            [FromQuery] float? framerate,
            [FromQuery] float? maxFramerate,
            [FromQuery] bool? copyTimestamps,
            [FromQuery] long? startTimeTicks,
            [FromQuery] int? width,
            [FromQuery] int? height,
            [FromQuery] int? videoBitRate,
            [FromQuery] int? subtitleStreamIndex,
            [FromQuery] SubtitleDeliveryMethod subtitleMethod,
            [FromQuery] int? maxRefFrames,
            [FromQuery] int? maxVideoBitDepth,
            [FromQuery] bool? requireAvc,
            [FromQuery] bool? deInterlace,
            [FromQuery] bool? requireNonAnamorphic,
            [FromQuery] int? transcodingMaxAudioChannels,
            [FromQuery] int? cpuCoreLimit,
            [FromQuery] string? liveStreamId,
            [FromQuery] bool? enableMpegtsM2TsMode,
            [FromQuery] string? videoCodec,
            [FromQuery] string? subtitleCodec,
            [FromQuery] string? transcodingReasons,
            [FromQuery] int? audioStreamIndex,
            [FromQuery] int? videoStreamIndex,
            [FromQuery] EncodingContext? context,
            [FromQuery] Dictionary<string, string>? streamOptions)
        {
            StreamingRequestDto streamingRequest = new StreamingRequestDto
            {
                Id = itemId,
                Container = container,
                Static = @static ?? true,
                Params = @params,
                Tag = tag,
                DeviceProfileId = deviceProfileId,
                PlaySessionId = playSessionId,
                SegmentContainer = segmentContainer,
                SegmentLength = segmentLength,
                MinSegments = minSegments,
                MediaSourceId = mediaSourceId,
                DeviceId = deviceId,
                AudioCodec = audioCodec,
                EnableAutoStreamCopy = enableAutoStreamCopy ?? true,
                AllowAudioStreamCopy = allowAudioStreamCopy ?? true,
                AllowVideoStreamCopy = allowVideoStreamCopy ?? true,
                BreakOnNonKeyFrames = breakOnNonKeyFrames ?? false,
                AudioSampleRate = audioSampleRate,
                MaxAudioChannels = maxAudioChannels,
                AudioBitRate = audioBitRate,
                MaxAudioBitDepth = maxAudioBitDepth,
                AudioChannels = audioChannels,
                Profile = profile,
                Level = level,
                Framerate = framerate,
                MaxFramerate = maxFramerate,
                CopyTimestamps = copyTimestamps ?? true,
                StartTimeTicks = startTimeTicks,
                Width = width,
                Height = height,
                VideoBitRate = videoBitRate,
                SubtitleStreamIndex = subtitleStreamIndex,
                SubtitleMethod = subtitleMethod,
                MaxRefFrames = maxRefFrames,
                MaxVideoBitDepth = maxVideoBitDepth,
                RequireAvc = requireAvc ?? true,
                DeInterlace = deInterlace ?? true,
                RequireNonAnamorphic = requireNonAnamorphic ?? true,
                TranscodingMaxAudioChannels = transcodingMaxAudioChannels,
                CpuCoreLimit = cpuCoreLimit,
                LiveStreamId = liveStreamId,
                EnableMpegtsM2TsMode = enableMpegtsM2TsMode ?? true,
                VideoCodec = videoCodec,
                SubtitleCodec = subtitleCodec,
                TranscodeReasons = transcodingReasons,
                AudioStreamIndex = audioStreamIndex,
                VideoStreamIndex = videoStreamIndex,
                Context = context ?? EncodingContext.Static,
                StreamOptions = streamOptions
            };

            return await _audioHelper.GetAudioStream(_transcodingJobType, streamingRequest).ConfigureAwait(false);
        }
    }
}
